Will any of my fish eat the baby bristlenose pleco when they come out of their cave?

The fish you have shouldn't necessarily eat the baby plecos as long as they have enough places to hide. Maybe you should get more ornaments or plants if there aren't many hiding places low to the gravel since they are bottom swimmers. Plecos and other catfish have hard spines so you don't want to accidentally damage them by trying to catch them and place them in a breeding box/tank. So, just make sure there's plenty of plants (fake or live doesnt matter) and shelter for them until they grow big enough to venture out and not be pecked at or eaten. :) Hope this helps!